Road scraper



y 0, 1933. C. L. JORDAN ROAD SQRAPER Filed Oct. 29, 1929 A TTORNEYS.

in an effective an Patented May 30, 1933 7 UNITED TATES ,RATENT A OFFICEcnars'rornnn. L. 30mm, or ammonia, CALIFORNIA ROAD scmrnr.

Application filed October 29, 1929. Serial No. 403,219.

An object of my invention is to provide a new, improved and effectivetype of road scraper which is used in conjunction with a powerfultractor for the purpose of excavating-and transportingearth from oneplace to another, as inthe leveling of ground in building foundationsand road building.

Another object of my invention is to provide a new and noveltype ofmounting for a scraper, whereb the same may be used convenient mannerwith a tractor and one which may be operated with a minimum amount ofhuman effort.

A further *object of my invention is .to provide a new and novelmounting for a scraper of the character above described,

wherein the scraper may be elevated, lowered, and tilted to dischargeits contents in an automatic and convenient manner.

Another object of my invention is to provide a novel type of wheelmounting for scrapers of the'type contemplated by my invention,whereby'the scraper may be effectively raised and lowered by theoperator from a point upon the tractor.

Other objects and advantages of my invention will be in part pointed outand in part evident as the description proceeds.

For a better understanding of my invention, reference should be had tovthe accompanying drawing, wherein I have shown by we of illustration andnot of limitation, a pre erred modification of apparatus em-. bodying minvention.

In this rawing Fig. 1 is a side elevation showing myimproved scraper inits lowered and operative position,

Fig. 2 is a plan view taken from Fig. 1,

Fig. 3 is a view similar to Fig. 1, showing my improved scraper in itselevated position and out of contact with the ground,

and

Figs. 4 and 5 are fragmentary views showing certain details ofconstruction. n the drawing, 10 designates generally a suitableframework whichis adapted to be attached to the rear end of a suitabletraction means 11. Attached to the-trailing end "of the frame 10, thereis an axle 12 which carries suitable wheels 13. The axle 12 extendsthrough a'suitable frame 14 which is pivoted to the frame 10 atthe-point 15.

Arranged above the axle 12, there is shown a fluid pressure cylinder 16,with which there is arranged a piston 17 which connects with the frame14 pivotally at its mid point. Journaled upon the lower part of theframe 10, as at the point 18, I show a suitable scraper or scoop 19.Connected to the scoop 19 at its rear'upper edge, I provide a piston rod20 which, in conjunction with a piston upon the end thereof, is actuatedby fluid pressure within a suitable cylinder 21. Vhen the scoop 19 is inits normal or scraping position, the parts will be in the position sustantially as illustrated, and when it is desired to dump, the contentsof the scoop 19, the latter will be tipped upwardly as the piston rod 20is drawn into the cylinder 21,

this in a manner well understood in the art. When the scoop 19 is beingdumped, it will she understood that the piston rod 17 will have beenextended from its cylinder 16 and, as a result, the frame 10 will beraised into its uppermost position, as illustrated in Fig. 3, .so thatthe scoop under these conditions can befreely tilted by fluid pressureadmitted to the cylinder 21.

As an operative means for actuating the pistons within the cylinders 16and 21 in my.

present embodiment, I propose to provide suitable pumps 22 and 23, thepump 22 being connected with the cylinder 16 and the pump 23 beingconnected with the cylinder 21. These connectionsbetween the cylindersand pumps, above referred to, it will be understood, merely form aclosed circuit through which oil or other noncompressible fluid may becirculated from one end of the cylinders to the other, so as to actuatethe iston therein in the well known manner.

uitable valves 24 are also illustrated as disposed in the pipeconnections. between the pumps and the cylinders.

By referring to Fig. 2, it will be seen that spectively upon gimbalbearings 26 and 27 A further feature of my invention which is importantis in the fact that I provide, as illustrated in Fig. 4, a suitabledrawbar 28 which is formed integrally with the forward end of the frame10, so that the forces exerted by the frame upon the scoop 19 will be"distributed between the pivotal points 18 at the ends thereof and thecentral drawbar 28. In other words, extending centrally into the scoop19, I provide a suitable par tition 29 and connect the drawbar pivotallto the partition 29, as at the point 30. suitable strutv 31 is alsoprovided at this point which connects with the upper part of the frame1O.

In order to provide againstan accidental dumping of the scoop, or thescoop becoming tilted by reason of contact with an obstacle, I alsoprovide, as is illustrated in Fig. 5, a suitable latch 32 which may beactuated by means of an arm 33 and a pull cord 34: when it is desired torelease the same. In order that the driver of the traction meansmay'have complete control of my improved scraper, I propose to extendthe pull cord 34 to a point upon the tractor where it may beconveniently grasped.

With the arrangements above described, it

will be readily appreciated-that I have provided in conjunction with myimproved scraper a means of control whereby the same may be convenientlyactuated by a single operator, who may at .the same time control thetraction means.

While I have, for the sake of clearness and in order to disclose myinvention so that the same can be readily understood, described andillustrated specific devices and arrangements, I desire to have itunderstood that this invention is not limited to the specific meansdisclosed but may be embodied in other ways that will suggestthemselves, in view of this broad disclosure, to persons skilled in theart. It is believed that this invention is broadly new and it is desiredto claim it as such so that all such changes as come within the scope ofthe appended claims are to be considered as part of this invention.-

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. An excavating scraper comprising a frame adapted tobe attached to a traction device and supported at one end thereby, ascraper pivotally mounted upon said frame for swinging movement from ascraping to a carrying position, a rolling support for the trailing endof said frame adapted to be raised and lowered with respect thereto forthe purpose of lowering and raising said frame with respect to theground, hydraulic means upon said frame connected with said scraper,.whereby the latter may be rocked about its pivots to discharge itscontents when said frame is raised and latch means for maintaining thescraper in its carrying position.

2. In an excavating scraper, the combination of a frame adapted to beattached to a traction device and supported at one end thereby, ascraper journaled at its ends transversely of said frame, a centralpartition extending into said scraper, a drawbar pivoted withrelation tosaid partition and connected to the frame and a support member connectedto the drawbar at a point adj acent said pivot and to the frame.

3. An excavating scraper comprising, a frame adapted to be attached to atraction device and supported at one end thereby; a scraper pivotallymounted upon said frame for swinging movement from a scraping to acarrying position, a rolling support for the trailing end of said frameadapted to be raised and lowered with respect thereto for the purpose oflowering and raising said framewith respect to the ground; fluidpressure means connecting said frame and said scraper whereby the lattermay be rocked about its pivots to discharge its contents, and means formaintaining the scraper in its carrying position.

4. In a device of the character described,

a frame pivotally connected adjacent one of its ends to a tractivedevice, a hydraulic apparatus connecting the other end of the frame to arolling support "and adapted to adjust the frame relative to therollingsupport, a scraper box pivotally connected to the frame, and a hydraulicapparatus connecting thescraper box to the frame to adjust it about itspivot.

CHRISTOPHER L. JORDAN.

